Set Square wrote:

In an earlier contribution to this discussion,
N. Thornton wrote:


I've not lived in a house yet where condensation happens on the walls,
so I still dont see it making a difference. If one had running walls
already I guess it would make things worse.


I've not witnessed excessive condensation myself - but I assume that it *is*
a problem in some cases - otherwise the current building regs about
ventilation are a waste of time!

Try a single brick bathroom extension with almost no heating in winter.

Water cascades off the walls over the bath